From: Walton Hoops <walton@...>
Date: 2010-05-01T06:40:20+09:00
Subject: Re: Setting to Ruby 1.9 in Ubuntu...

On 4/30/2010 2:22 PM, Xeno Campanoli / Eskimo North and Gmail wrote:
> Walton Hoops wrote:
>> On 4/30/2010 1:36 PM, Xeno Campanoli / Eskimo North and Gmail wrote:
>>> I tried installing a bunch of ruby 1.9 stuff on my Ubuntu laptop last
>>> night, but my default ruby is still 1.8.7.  Anybody know a regular
>>> method for setting to 1.9 on Ubuntu?  Perhaps this is an Ubuntu
>>> question, but presumably the best way is not always the Ubuntu
>>> way...???
>> The Ubuntu way is to run 'sudo update-alternatives --config ruby' and
>> 'sudo update-alternatives --config rubygems', or instead of calling Ruby
>> scripts with 'ruby', call them with 'ruby1.9' when you want them run
>> in 1.9.
>>
>> Another solution that is available is Ruby Version Manager (RVM).  I've
>> never used RVM, so I can't say anything for or against it.
>> http://rvm.beginrescueend.com/
>>
>>
>
> Thank you.  That didn't get me there, but I really appreciate the
> quick response, and that actually helps me in some other areas.
>
> I got this:
>
> root@rockhopper:~# update-alternatives --config ruby
> update-alternatives: error: no alternatives for ruby.
> root@rockhopper:~# update-alternatives --config rubygems
> update-alternatives: error: no alternatives for rubygems.
> root@rockhopper:~#
>
> rvm in that guise is not on my apt purvey.  I appreciate the
> suggestions. Perhaps if it's this hard it's better to wait for the OSs
> to upgrade themselves anyway.  I just noticed the CentOS we use is way
> back to ruby 1.8.5.  I sure hope we stop using CentOS soon.  It is a
> dog, and wastes a lot of our time. Debian family stuff has it's
> problems, but for my work it seems to always come out as superior.
>
Ugh.  I just assumed that Ruby would be managed through the
alternatives.  This is why I run from source.

The lazy man's solution to your problem is to simply change the symbolic
link 'ruby' in /usr/bin to point to 'ruby1.9' instead of 'ruby1.8' (the
same would need to be done for rubygems.  Make sense?